Radio receiving equipment



Feb. 22, 1927;

J. c. R.. PALMER RADIO RECEIVING EQUIPMENT Filed'Jupe 13, 1923 Patented Feb. 22, 192-7.

/ UNITED STATES PATENT OFFICE.

JOEL C. R. PALMER, F NEW ROCHELLE, NEW YORK, ASSIGNOR TO WESTERN ELEC- TRIO COMPANY, INCORPORATED, OF NEW YORK, N. Y., A. CORPORATION OF NEW tronx.

RADIO RECEIVING EQUIPMENT.

Application filed June 13,

' loud speaking receiver, the object being to provide for the convenient assembly and mounting of these devices in a limited or restricted area.

On account of their bulks the space, requlred at present to mount the loop antenna and the loud speaking receiver of a complete radio receiving equipment is considerable.

This invention provides for the mounting of both the antenna and loud speaking equipment in a space butlittle greater than;

that heretofore required for mounting either of them alone. This saving in space is brought about by mounting these two devices in concentric relationto each other. In the preferred arrangement the loop antenna and the receiver may be mounted.

upon the same support with the antenna ad justable to different angular positions.

Referring to the drawing: Fig, 1 is a front elevation showing a loop antenna and a loud speaking receiver mounted in concentric relation; Fig. 2 is a section taken on the line 22 of Fig. 1; Fig. 3 is a plan view indicating the range of rotation of the antenna; and Fig. 4 is a schematic diagram of a suitable receiving circuit.

A pedestal 5 supports a standard 6 to which is secured a loud speaking receiver having a direct-acting diaphragm denoted in general by 7 which may be of any suitable construction. The loud speaking receiver shown in the drawing comprises a conical diaphragm 8 attached to a frustoconical member 9, which is supported by an annulus 10 Annulus 10 is supported by light, flexible spokes 11, which may be of rattan or aluminum, and are suitably affixed to a hub 12 secured to standard 6 by any suitable means such as a bolt 13. The

- diaphragm may be driven by any suitable and well known element 1 1 which may be of the form shown in United States patent to Egerton No. 1,365,898, January 18, 1921.

A further description of the loud speaker is not thought to be necessary since its specific construction formsno part of the-present invention, and any suitable and well known type may be employed.

. The loop antenna consists essentially of 1923. Serial No. 645,067.

the horizontal arm 19 'of standard 6; and

pivot 18 projects from boss 20 of pedestal 5. These two pivots permit the rotation of the antenna about a vertical axis as indicated in Fig. Should it be desired to rotate the antenna through a greater angle than is indicated in Fig. 3, it can be easily accomplished by turning the pedestal 5.

The invention contemplates the use of any suitable receiving circuit, such as the well known type of circuit shown in Fig. 4. The antenna 15, in parallel with a variable condenser 21, is connected to the input circuit of .a detector tube 23. -The output of the detectorjtube after being amplified by one or more amplifying tubes 24 is delivered infa well known manner to theloud speaker 25. which is .in concentric relation' .with'antenna 15. p

It is seen that the present invention provides a compact arrangement. of, loop antenna and loud speaking receiverv Wl1lCh Q-f-- fects a great reductionof the space requ red for a radio receiving set employ ng both a.

loud speaker and loop antenn The invention claimed is:

1. In a radio receiving equipment,a port able'unit comprising aloud speaking receiver having a large direct acting-diaphragm, a standard for supporting sa-idreceiver, a frame supported on said standard large direct acting diaphragm, a frame pivotally supported between said base and said horizontal member, the axis of rotation of said frame lying substantially in the plane of the periphery of said diaphragm and a loop antenna wound on said frame.

8. In a radio receiving equipment, a portable unit comprising a loud speaking receiver having a large direct acting diaphragm, a standard for supporting said receiver, a loop antenna encircling said diaphragm, and means pivotaliy supporting said antenna. 011 said standard for rotary movement with respect to said diaphragm.

4;. In a radio receiving equipment, a portable, unit; comprising a standard, a loud speaking receiver having a large direct acting diaphragm, means rigidly securing said receiver to said standard, a loop antenna encircling said diaphragm, and means pivot- 10 ally securing said antenna to said standard. In Witness whereof, I hereunto subscribe my name this 1st day of J une A. D., 1923. J OEL G. R. PALMER. 

